diff --git a/.gitignore b/.gitignore
index 3776a10..d0835e6 100644
--- a/.gitignore
+++ b/.gitignore
@@ -5,7 +5,7 @@
 !.vscode/launch.json
 !.vscode/extensions.json
 *.code-workspace
-
+*.log
 # Local History for Visual Studio Code
 .history/
 *.app
diff --git a/.vscode/settings.json b/.vscode/settings.json
index a8c2003..4b5a294 100644
--- a/.vscode/settings.json
+++ b/.vscode/settings.json
@@ -1,5 +1,4 @@
 {
     "python-envs.defaultEnvManager": "ms-python.python:conda",
-    "python-envs.defaultPackageManager": "ms-python.python:conda",
-    "python-envs.pythonProjects": []
+    "python-envs.defaultPackageManager": "ms-python.python:conda"
 }
\ No newline at end of file
diff --git a/__pycache__/remo_disp_server.cpython-312.pyc b/__pycache__/remo_disp_server.cpython-312.pyc
new file mode 100644
index 0000000..4539401
Binary files /dev/null and b/__pycache__/remo_disp_server.cpython-312.pyc differ
diff --git a/_proto_test.png b/_proto_test.png
new file mode 100644
index 0000000..735da16
Binary files /dev/null and b/_proto_test.png differ
diff --git a/remo_disp_server.py b/remo_disp_server.py
index 4617a46..e41f612 100644
--- a/remo_disp_server.py
+++ b/remo_disp_server.py
@@ -267,18 +267,39 @@ def mono_to_png(data: bytes, width: int, height: int) -> Optional[bytes]:
             height=height,
             len_=len(data),
         )
-        img = Image.new("1", (width, height))  # 创建 1bpp 黑白图像
-        pix = img.load()  # 获取像素访问对象
-        '''
-        for y in range(height):
-            for x in range(width):
-                bi = (y * width + x) // 8  # 字节索引：每 8 像素一字节
-                bit = 7 - (x % 8)  # 位索引：高位在前
-                pix[x, y] = 0 if (bi < len(data) and (data[bi] >> bit) & 1) else 255  # 1→白 0→黑
-        '''
-        for y in range(height):
-            for x in range(width):
-                pix[x, y] = data[y * width + x]
+        expected_bits = (width * height + 7) // 8  # 1bpp 打包长度
+        expected_bytes = width * height  # 每像素 1 字节(0/1或0-255)长度
+
+        if len(data) == expected_bits:
+            # 1bpp：每字节 8 像素，高位在前
+            logger.debug("[mono_to_png] 使用 1bpp 打包解码")
+            img = Image.new("1", (width, height))
+            pix = img.load()
+            for y in range(height):
+                row_base = y * width
+                for x in range(width):
+                    byte_i = (row_base + x) // 8
+                    bit_i = 7 - (x % 8)
+                    bit = (data[byte_i] >> bit_i) & 1
+                    pix[x, y] = 255 if bit else 0
+        elif len(data) == expected_bytes:
+            # 8bit：每字节直接对应一个像素，非零当作白
+            logger.debug("[mono_to_png] 使用每像素 1 字节解码")
+            img = Image.new("1", (width, height))
+            pix = img.load()
+            for y in range(height):
+                row_base = y * width
+                for x in range(width):
+                    pix[x, y] = 255 if data[row_base + x] else 0
+        else:
+            logger.warning(
+                "[mono_to_png] payload 长度不匹配，丢弃该帧: data_len={len_}, expected_bits={bits}, expected_bytes={bytes}",
+                len_=len(data),
+                bits=expected_bits,
+                bytes=expected_bytes,
+            )
+            return None
+
         buf = io.BytesIO()  # 内存缓冲区
         img.save(buf, format="PNG")  # 保存为 PNG 格式
         png_bytes = buf.getvalue()
@@ -329,7 +350,7 @@ def _screen_refresh_loop():
                     # 当前协议未返回宽高，这里固定为 160x160，可根据实际情况调整
                     w, h = 160, 160
                     png = mono_to_png(data, w, h)  # 转为 PNG
-                    if png:
+                    if png and isinstance(png, (bytes, bytearray)) and png.startswith(b"\x89PNG\r\n\x1a\n"):
                         b64 = base64.b64encode(png).decode("ascii")  # base64 编码便于 JSON 传输
                         for sid in list(_screen_clients):  # 复制列表避免迭代时修改
                             try:
@@ -344,6 +365,11 @@ def _screen_refresh_loop():
                                     sid=sid,
                                     err=e,
                                 )
+                    elif png:
+                        logger.warning(
+                            "[_screen_refresh_loop] 生成的 PNG 无效或签名错误，丢弃该帧 png_len={len_}",
+                            len_=len(png),
+                        )
                 else:
                     # 拉取失败，累计连续失败次数
                     consecutive_failures += 1
diff --git a/remo_disp_ui.html b/remo_disp_ui.html
index fc253f8..2358cb4 100644
--- a/remo_disp_ui.html
+++ b/remo_disp_ui.html
@@ -392,8 +392,12 @@
       }
     });
     // 服务端推送屏幕：data.png 为 base64 编码的 PNG，解码后绘制到 canvas
+    const scale = 2; // 放大倍数（160x160 -> 320x320）
+    let canvasInitialized = false;
+    let latestFrameId = 0; // 用于丢弃旧帧，避免异步解码乱序导致闪烁
     socket.on('screen', (data) => {
       if (!data.png) return;
+      const frameId = ++latestFrameId;
       // 无 base64 数据则跳过
       const binary = atob(data.png);
       // base64 解码为二进制字符串
@@ -406,21 +410,38 @@
       // 创建临时 URL
       const img = new Image();
       img.onload = () => {
-        // 图片加载完成后，放大一倍显示（160x160 -> 320x320）
-        const scale = 2;
-        canvas.width = img.width * scale;
-        canvas.height = img.height * scale;
+        // 图片加载完成后：若该帧不是最新帧则直接丢弃
+        if (frameId !== latestFrameId) {
+          URL.revokeObjectURL(url);
+          return;
+        }
+
+        // 首帧初始化 canvas 尺寸（只做一次，避免反复重设导致清空闪烁）
+        const targetW = img.width * scale;
+        const targetH = img.height * scale;
+        if (!canvasInitialized) {
+          canvas.width = targetW;
+          canvas.height = targetH;
+          canvasInitialized = true;
+          canvas.style.display = 'block';
+          placeholder.style.display = 'none';
+        }
+
         const ctx = canvas.getContext('2d');
         ctx.imageSmoothingEnabled = false;
-        // 关闭平滑，像素清晰放大
+        // 关闭平滑：像素清晰放大
         ctx.drawImage(img, 0, 0, img.width, img.height, 0, 0, canvas.width, canvas.height);
-        // 绘制到 canvas（2 倍尺寸）
-        canvas.style.display = 'block';
-        placeholder.style.display = 'none';
-        // 显示 canvas，隐藏占位符
+
         URL.revokeObjectURL(url);
         // 释放临时 URL
       };
+      img.onerror = () => {
+        // 发生错误时同样释放临时 URL
+        if (frameId === latestFrameId) {
+          // 不弹窗，避免影响观察；必要时可在这里加日志
+        }
+        URL.revokeObjectURL(url);
+      };
       img.src = url;
       // 触发加载
     });
@@ -465,6 +486,8 @@
       placeholder.style.display = '';
       placeholder.textContent = '点击「连接」连接装置';
       // 隐藏 canvas，显示占位符
+      canvasInitialized = false;
+      latestFrameId = 0;
     }
 
     document.querySelectorAll('.dpad .btn, .action-btn').forEach(btn => {